Pocket-filter.



I. ENDRESON.

POCKET FILTER.

APPLICATION FILED APR. :2, 191a.

Patented J an. 28, 1919.

INVENTOR 070/711 ,Emd're'cm ATTORNEY I Brooklyn, in the county of Kings and JOHN ENDIRAESON, OF BROOKLYN, NEW YORK.

POCKET-FILTER.

Specification of Letters Patent.

Application filed April 12, 1918. Serial No. 228,250.

To all whom it may concern:

Be it known that I, JOHN ENDRESQN, a citizen of the United States, residin r at tate of New York, have invented new and useful Improvements in Pocket-Filters, of which the following is a specification.

This invention relates to pocket filters and has for its object the provision of a device of this character which will include instrumentalities whereby the same can be conveniently carried in the pocket of the user;

1 designing and arranging said instrumentalities so that the fluid will be thoroughly cleansed and relieved of all dangerous germs and impurities in the passage of the fluid toward the outlet of the deviceyproviding means in the device whereby a column of water may be always maintained therein as long as the intake end of the deviceis projected into a body of water, and further associating mating parts of the device .so that they may be conveniently disconnected from each other to fully expose the filteringsubstance and permit of removal thereof when desired.

With the above and other objects in view which will appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangements of parts which will hereinafter be fully described and particularly pointed out'in the claim.

In the accompanying drawings, has been illustrated, a single and preferred form of the invention, it being, however, understood that no limitations are necessarily made to the precise structural details therein exhibited, but that changes, alterations and'modifications within the scope of the claim may be resorted to when desired. a

Figure 1 is a side view of the device with the cap applied.

Fig. 2 is'a vertical section therethrough with the cap removed.

Fig. 3 is a section on line 3-3 of Fig. 2.

The device comprises an intermediate filtering chamber 5 which preferably consists of a single length of metal or rigid tubing, the same being exteriorly threaded at 6 and interiorly threaded at 7 at its opposite ends respectively. Connected with the threads 7 is a mouth piece 8 having a thread 9 adapted to receive a corresponding internal thread 10 on a closing and protecting cap 11 as illustrated in Fig. 1*

The opposite thread 6 of the tubular (3113.111- ber 5 is connected with a valve chamber 12 the same also being of tubular formation and it is provided with an internal valve seat 13 above which is a ball valve 14. Below the seat is a disk or wire cloth or filtering substance 15, while directly under the latter and detachably connected with the tubular chamber 12 is a strainer 16. Within the valve chamber at a point above the ball 14: is a filtering disk 17 of wire gauze and above the latter is a disk 18 of suitable filtering cloth. The disk 15 is arranged to rest against the base of-the valve seat and'the strainer serves as a retainer to hold said disk in proper position so that the water as it passes from the strainer and into the valve chamber will be intercepted by said disk and strained. The disks 17 and 18 are preferably removably mounted against a shoulder 19 arranged within the valve chamber.

At the opposite end of the filtering chamher at a point directly beneath the mouth piece 8 is a filtering disk 20 of wire gauze and arranged thereabove is a second disk 21 of suitable fibrous material, such as linen. The disk 18 may also be constructed of linen. A shoulder 22 within the upper end of the filtering chamber is designed to receive the disks 20 and 21 thereagainst.

Within the filtering chamber are closely associated long fibrous strands 23 of porous material such as linen threads. These strands are arranged to almost entirely oc cupy the filtering chamber. Each strand is of circular formation in transverse section so that infinitesimal longitudinal spaces 24; are formed between the respective strands. Through this arrangement it will be manifest that a free passage is provided for the Water in its course through the filtering chamber and yet it will be properly subjected to the action of the strands 23 so that allinjurious impurities will be properly re- Patented Jan. 28, 1919;

moved before the water reaches the mouth piece 8.

By providing the valve 14 it will be observed that as soon as water is drawn into the device and suction removed from the mouth piece, the ball will gravitate to a closed position and a column of water will therefore be maintained in the device so that without undue exertion of suction subsequently against the mouth piece the water can be taken up in a perfectly free manner as the column thus preserved will be maing, assays? tained indirect contact with the source from which the water is taken.

The device is designed to be carried in the pocket of the user, it will be found extremely 5 valuable to travelers and those desiring to partake of water which might not be in a sanitary condition and the several features of the device as specified herein permit the user to take of such waters with a certain 10 measure of safety.

W hat is claimed as new is A filter comprising a filtering chamber having, an outlet and by means of which liquid may be drawn through said chamber, a filling of filtering substance associated with '15 said chamber, and a valve chamber detachably connected with said filter chamber, a seat in said valve chamber, a filtering disk beneath said seat, an intake strainer leading I to said seat, and a gravity valve co-actmg 20 with said seat and serving to maintain a. column of liquid in the filter and valve chambers respectively when suction upon said outlet end is broken. y

In testimony whereof, I aflix my si nature. 25

JOHN ENDRESON. 

